How do the functions of oligodendrocytes differ from those of Schwann cells?
What will be an ideal response?
Oligodendrocytes completely sheathe the axons of many neurons in the CNS, covering them with myelin, which speeds the rate of impulse conduction. In contrast, Schwann cells occur in the PNS and produce a covering around every peripheral axon, whether or not it is myelinated. A Schwann cell can myelinate only one portion of a single axon, while an oligodendrocyte can myelinate more than one axon simultaneously.
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Which is not characteristic of neurons?
A. High metabolic rate B. Extreme longevity C. High mitotic rate D. Require continuous supplies of glucose and oxygen E. No exceptions; all of these are characteristic of neurons
Which division of the nervous system is responsible for accelerating the heart rate in an emergency?
A. Somatic sensory division B. CNS C. Sympathetic division D. Parasympathetic division E. Somatic motor division
In addition to temperature control, blood flowing to the skin supplies a source of ____________________
Fill in the blank(s) with correct word
Which of the following statements best defines the oxygen-hemoglobin dissociation curve?
A. A graphical representation of the amount of oxygen found in the atmosphere B. A graphical representation of the relationship between hemoglobin's percent saturation at a particular partial pressure of oxygen C. A graphical representation of the amount of hemoglobin found in the blood D. A graphical representation of the amount of oxygen bound to hemoglobin and how that affects the partial pressure of O2 in the blood